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Forum: Psychology Statistics

Psychological statistics, quantitative psychology. Statistics in social sciences. Experimental design, data analysis.

  1. Arrow Sticky Thread Sticky: Please Read This Before Posting

    Please provide us with some basic information before we can give useful advice: 1. purpose of the study / research question / hypotheses, if...

    Started by quark‎, 11-10-2005 12:21 AM
    • Replies: 0
    • Views: 21,875
    11-10-2005, 12:21 AM Go to last post
  1. Difference Measurement (compare means) between two continuous variables

    Hello, I'm looking for a test and need some help :( .. Variable 1: value (continuous) Variable 2: expectation (continuous) Dependent...

    Started by yologer‎, 01-15-2016 09:08 AM
    compare means
    • Replies: 5
    • Views: 506
    01-15-2016, 12:36 PM Go to last post
  2. Question What is best method to calculate correlation for 2 nominal variables?

    Hello, I am analyzing data that looks at several nominal variables (e.g. employment status, race, gender, etc.) to determine if it plays a factor...

    Started by greathl21‎, 01-14-2016 02:27 PM
    correlation, cramer's v, nominal variable
    • Replies: 5
    • Views: 716
    01-14-2016, 05:03 PM Go to last post
  3. Dealing with Score Dependency in Repeated Measures ANOVA

    I am writing a report for my company looking at the impact of a relationship education curriculum on participants. Prior to the class, immediately...

    Started by statsgirl87‎, 01-11-2016 05:20 PM
    repeated measures anova, score dependency
    • Replies: 3
    • Views: 483
    01-13-2016, 01:36 AM Go to last post
  4. Between-subjects or mixed design depending on ANCOVA conducted

    Hello, In a study I'm evaluating,*participants experienced the same stressful event and were then split into 5 different experimental conditions....

    Started by bedalo94‎, 01-11-2016 08:49 AM
    • Replies: 1
    • Views: 387
    01-12-2016, 02:16 PM Go to last post
  5. curvilinear regression using 2covariates

    Hello, For my dissertation I am looking at the effects of overparenting (cont. variable) on students' self-regulated learning (cont. variable). I...

    Started by bre384‎, 01-11-2016 09:21 PM
    • Replies: 1
    • Views: 382
    01-12-2016, 06:37 AM Go to last post
  6. Gender differencies + effect size

    Hi, I have just received some results from various tests. I would like to check the gender differencies (boys vs girls) in test scores. I am...

    Started by lohengrin‎, 12-27-2015 11:37 AM
    cohen function, wilcox test
    • Replies: 2
    • Views: 1,302
    12-30-2015, 05:52 PM Go to last post
  7. Factorial MANOVA or multivariate multiple linear regression? (2 DVs and 6 IVs)

    Hello, Very briefly, I'm working on my research proposal for my Psych MSc, and I'm trying to work out which tests would be best to use. As it...

    Started by ArielPsych‎, 12-30-2015 08:57 AM
    psychology statistics, stats help
    • Replies: 0
    • Views: 607
    12-30-2015, 08:57 AM Go to last post
  8. Repeated Measures of Latent Variable DV? [Which Test?]

    Hello, I'm attempting to analyze the effects of 1 categorical IV (before and after participants complete a program) on 1 latent variable DV that...

    Started by magwai‎, 12-22-2015 09:24 AM
    • Replies: 0
    • Views: 547
    12-22-2015, 09:24 AM Go to last post
  9. Power analysis for GEE

    I am designing a study that would require using GEE (generalized estimating equations) to analyze repeated measures of a dichotomous variable. Is...

    Started by blc‎, 12-07-2015 02:48 PM
    dichotomous dv, gee, repeated measures design
    • Replies: 2
    • Views: 1,004
    12-18-2015, 07:32 PM Go to last post
  10. What analysis do IQ tests use?

    I can't find anywhere what statistical analysis IQ tests (like Weschler scales, BAS, etc.) use. It is not stated in any of their material (that I...

    Started by cmms‎, 12-13-2015 01:53 PM
    factor analysis
    • Replies: 3
    • Views: 823
    12-13-2015, 08:34 PM Go to last post
  11. Comparing between correlation coefficients

    Hi, I have experimental design which includes 3 dependent variables (Reading Mind in the Eyes test and 2 other measures of social cognition, for...

    Started by Gilina78‎, 12-13-2015 04:33 PM
    correlations; dependancy, correlations; time series, mancova, regression analysis, zsteiger's z
    • Replies: 0
    • Views: 478
    12-13-2015, 04:33 PM Go to last post
  12. What does it mean to norm an instrument say mathematics attitudes scale?

    Hello I was wondering if norming an instrument is the same as developing an instrument say some mathematics attitudes survey or something? I...

    Started by Ilma‎, 12-12-2015 10:21 PM
    • Replies: 1
    • Views: 532
    12-13-2015, 04:22 AM Go to last post
  13. marginally significant 3-way interaction ANOVA

    Hi everyone, I have to analyze the data of an intervention study, in which a treatment and control group were tested before and after the...

    Started by dejam‎, 12-12-2015 12:24 PM
    • Replies: 1
    • Views: 523
    12-12-2015, 06:23 PM Go to last post
  14. ANCOVA assumptions SPSS help..!

    Hi everyone, Just wondering if someone could help me. I need to conduct a repeated measures ancova (4 levels) with no between subjects factor....

    Started by ANCOVA'D‎, 12-10-2015 06:54 AM
    • Replies: 0
    • Views: 527
    12-10-2015, 06:54 AM Go to last post
  15. When to use Bonferroni

    I am working with a mark-all-that-apply survey question that has 8 categorical response options. I am comparing responses statistically between two...

    Started by N. Adams‎, 12-09-2015 03:42 PM
    bonferroni correction, groups, multiple response
    • Replies: 0
    • Views: 593
    12-09-2015, 03:42 PM Go to last post
  16. "bias" in chi-square GOF tests?

    Simple question (simple for some people) about the chi-square GOF test: Let's say we do a chi-square GOF test where the the expected values are...

    Started by bruin‎, 12-07-2015 02:14 PM
    • Replies: 1
    • Views: 603
    12-07-2015, 02:40 PM Go to last post
  17. Disagreement with my advisor about Cronbach's alpha for my thesis

    My psychology thesis is for an interdisciplinary degree, so I wasn't able to take any advanced methods before completing the research. I took two...

    Started by adtree74‎, 12-06-2015 03:30 PM
    • Replies: 2
    • Views: 584
    12-06-2015, 05:34 PM Go to last post
  18. What's a good resource to brush up on college level psychology stats?

    I've taken quite a few different courses, but have since forgotten some of the details. I'm interested in the applied aspects of sampling, all sorts...

    Started by etest‎, 12-02-2015 12:28 PM
    • Replies: 1
    • Views: 659
    12-02-2015, 08:24 PM Go to last post
  19. Comparing absolute values of difference scores between two groups

    I have two groups (A and B) that each completed a different version of an experimental measure (measure A and measure B). Both groups also completed...

    Started by ShakeyD‎, 12-01-2015 09:34 PM
    measurement, reliability, variance
    • Replies: 4
    • Views: 748
    12-02-2015, 06:19 PM Go to last post
  20. Dealing with Missing Data...

    So I have ran into an issue with my study. We utilized Qualtrics to design an online survey/study that had subjects complete 10 questionnaires and...

    Started by theemezz0‎, 11-30-2015 12:41 PM
    • Replies: 9
    • Views: 1,165
    12-01-2015, 07:19 PM Go to last post
  21. I failed the 4/5ths Rule. Can I prove it is not significant?

    I am a (hypothetical) employer who used an aptitude test to screen candidates for their trainability before hire. I am being sued for discriminating...

    Started by cellardoor367‎, 12-01-2015 11:10 AM
    eeoc, four fifths rule, t test, uniform guidelines
    • Replies: 1
    • Views: 565
    12-01-2015, 04:47 PM Go to last post
  22. 3 experiments and the same 3 scales as DV - run Factorial Analysis together or sep

    Hi! I realized three experiments (varying only the marketing context) and used as dependent variables the same three scales (attitude, purchase...

    Started by fabiorfborges‎, 11-30-2015 06:40 AM
    experiments, factor analysis
    • Replies: 1
    • Views: 452
    12-01-2015, 08:09 AM Go to last post
  23. Question Repeated measures ANCOVA in SPSS help needed with multiple covariates

    Hello everyone. Hope someone can help. I have a repeated measures (4) ancova I need to run with no between subjects factor. I have 5 covariates....

    Started by ANCOVA'D‎, 11-26-2015 01:15 PM
    ancova, repeated measures
    • Replies: 2
    • Views: 790
    11-27-2015, 06:14 AM Go to last post
  24. Help me in two way anova please

    After using log transformation, my data is homogenous. So i want to use two way anova analysis. In that analysis should i data that has been...

    Started by Sabila‎, 11-25-2015 03:42 PM
    • Replies: 3
    • Views: 621
    11-26-2015, 03:32 AM Go to last post
  25. Is this data normally distributed?

    Got my question answered. Thank you guys

    Started by paperrockbazooka‎, 11-24-2015 08:22 PM
    • Replies: 5
    • Views: 856
    11-26-2015, 02:25 AM Go to last post
  26. Help in Levene's test, Please

    Hi, I did an experiment, studying on the effects of types of sugar and their concentrations on milk spoilage. The sugars I was using are sucrose,...

    Started by bom_bomkung‎, 11-30-2006 09:51 PM
    • Replies: 13
    • Views: 28,500
    11-25-2015, 03:39 PM Go to last post
  27. Incremental validity testing

    Hi everyone, The short story first: I was asked by reviewers to formally test whether a variable V1 is incrementally valid (explains more...

    Started by katsch‎, 11-25-2015 01:00 AM
    • Replies: 0
    • Views: 448
    11-25-2015, 01:00 AM Go to last post
  28. t-test help- what is the IV???

    I did an experiment where I got data on children’s playmate choices (like if they chose to play with boys or girls or both or neither). My...

    Started by heeeeeellllllpppppppppp‎, 11-18-2015 03:05 PM
    proportion test
    • Replies: 8
    • Views: 926
    11-19-2015, 06:07 AM Go to last post
  29. multiple regfression

    Hello forum.I am very new in statistics so pardon me if the questions are too silly:) Within the frameworks of a lab report, i conducted a multiple...

    Started by LEMONIAS‎, 11-14-2015 11:37 PM
    • Replies: 8
    • Views: 892
    11-16-2015, 11:16 PM Go to last post
  30. creating scores based on LCA classification

    With LCA (Mplus) on 11 variables, we grouped 1100 patients into 3 classes. Now, we want to create a score, to classify future patients to one of...

    Started by fengyuwuzu‎, 11-13-2015 10:13 AM
    • Replies: 0
    • Views: 480
    11-13-2015, 10:13 AM Go to last post
  31. How to create norms for a new assessment?

    If a novel assessment is created and tested on hundreds of participants, what is the process of converting raw scores to standard scores with a mean...

    Started by blc‎, 11-12-2015 11:19 AM
    • Replies: 1
    • Views: 634
    11-12-2015, 11:30 AM Go to last post
  32. Bar graph showing difference of means

    Is there a way to create a bar graph, with multiple DVs, showing the difference between the means of the IV? I have two experimental conditions and...

    Started by Tigerlily‎, 11-09-2015 04:10 PM
    bar graph, difference of means, multiple dv's
    • Replies: 8
    • Views: 898
    11-11-2015, 04:57 PM Go to last post
  33. Regression to the mean

    Hello, I have a question concerning regression to the mean. Suppose there is a test X, which is taken by 30 people. Person A has a score of 10...

    Started by Helge‎, 11-06-2015 02:15 PM
    • Replies: 1
    • Views: 564
    11-10-2015, 03:09 AM Go to last post
  34. What statistical test should I use.

    So I am writing a report on whether mean intelligence through an IQ test and mean psychopathy scores (DV) are significant in different types of crime...

    Started by TomXD1‎, 11-04-2015 01:17 PM
    analysis, psychology, test
    • Replies: 0
    • Views: 535
    11-04-2015, 01:17 PM Go to last post
  35. How do you display the correlation significance level (.08**) in AMOS

    Sorry this is a basic question but I can't figure out how to display the significance level asterisks associated with the correlations/covariances on...

    Started by Cardale‎, 11-03-2015 03:23 PM
    • Replies: 0
    • Views: 395
    11-03-2015, 03:23 PM Go to last post
  36. Question (SPSS) Meta-analysis about control variables in psychology research

    Hello everyone, I'm doing a research on the use of control variables in studies about 'the psychological contract'. I'm almost done with my...

    Started by Paolo‎, 11-03-2015 12:58 PM
    coding, control variables, psychological contract, spss
    • Replies: 0
    • Views: 450
    11-03-2015, 12:58 PM Go to last post
  37. Z-Scores: Finding the score which separates the top 40% from the bottom 60%?

    Hi there I am struggling a little with my z-scores. This was one of my questions which I do not understand: For a normal distribution with a mean...

    Started by gpmp1996‎, 11-03-2015 04:36 AM
    z-scores
    • Replies: 1
    • Views: 591
    11-03-2015, 09:56 AM Go to last post
  38. If total variance explained is less than 60%...

    I am conducting an exploratory factor analysis of some data exploring bullying behaviour. In my initial EFA I have found that 11 factors were...

    Started by rubyred89‎, 11-01-2015 04:25 PM
    • Replies: 4
    • Views: 1,240
    11-03-2015, 05:17 AM Go to last post
  39. How to analyze dichotomous DV with between- and within-subjects factors?

    Hello everybody, I am designing a study and need to make sure I'll be able to analyze the data (or else I will modify the design). For the...

    Started by blc‎, 10-28-2015 12:04 AM
    dichotomous dv, logit regression, mixed design, multilevel modeling, within-subject
    • Replies: 2
    • Views: 748
    10-28-2015, 03:55 PM Go to last post
  40. Physiological response to musical stimuli

    I have performed a study whereby I measure participant’s physiological response (HRV which is a continuous variable) to different musical stimuli....

    Started by p_billy_c‎, 10-26-2015 05:10 AM
    • Replies: 4
    • Views: 693
    10-28-2015, 07:59 AM Go to last post
  41. How to analyse data when subjects received both control and experimental condition?

    Dear all, I hope to get some suggestions on how to analyse the data from an experiment I recently ran. My question is whether a new treatment has a...

    Started by Marieke21‎, 10-27-2015 11:09 AM
    control condition, pre-post, repeated measures, treatment
    • Replies: 2
    • Views: 483
    10-27-2015, 11:37 AM Go to last post
  42. Checking homogeneity of regression with multiple covariates

    Hi, I am running an ANCOVA with 2 fixed factors, while controlling for 3 covariates, and I would like to test the assumption of homogeneity of...

    Started by nielsl‎, 10-27-2015 09:56 AM
    • Replies: 0
    • Views: 348
    10-27-2015, 09:56 AM Go to last post
  43. Help please with bootstrapping HMR SPSS output interpretation and reporting

    Hi I am in the middle of writing up a lab that is due in 12 hours (eeekkkk!!) and I am having issues interpreting the SPSS output on a bootstrapped...

    Started by Becdev‎, 10-25-2015 06:01 AM
    • Replies: 0
    • Views: 498
    10-25-2015, 06:01 AM Go to last post
  44. Non-parametric and parametric tests combined ??

    Hi everyone, I'm achieving a postdoc study in Psychology (75 participants) in Belgium and I need your help... The aim of the study is to look at...

    Started by shaxhe‎, 10-19-2015 09:21 AM
    • Replies: 6
    • Views: 756
    10-20-2015, 02:37 PM Go to last post
  45. Post I would really appreciate your Help very important to me

    I have an exam next week and I got sample questions that look like these two below: It would really help if someone would explain me just a...

    Started by Henrico‎, 10-20-2015 02:09 PM
    • Replies: 0
    • Views: 493
    10-20-2015, 02:09 PM Go to last post
  46. presenting the results of logistic regression with dichotomous IVs

    I have a question about how to present the results of a series of 6 logistic regressions in which I have the same 2 dichotomous/binary IVs. The...

    Started by charles matthew‎, 10-18-2015 09:38 PM
    binary outcome, dichotomous iv, logistic regression, presentation
    • Replies: 1
    • Views: 550
    10-19-2015, 09:13 AM Go to last post
  47. w-score vs. z-score with age/sex covariate

    Hi everyone, I want to predict gray matter (GM) volume in a group of patients based on their degree of cognitive impairment, corrected for age and...

    Started by AnLo‎, 10-15-2015 11:14 AM
    z-score
    • Replies: 0
    • Views: 656
    10-15-2015, 11:14 AM Go to last post
  48. Research statistics conundrum!

    Hello, I'm completing my proposal for my dissertation and I've gotten to the statistical analysis and having a bit of a me***own, hoping to get some...

    Started by getlonelyy‎, 10-15-2015 05:16 AM
    • Replies: 0
    • Views: 449
    10-15-2015, 05:16 AM Go to last post
  49. MANOVA vs Chi Square (and continuous variables?)

    **edited to add: Hmmm, maybe I should have named the thread MANOVA vs. Chi Square vs. two regression analyses?** Hi all, I'm in the final stages...

    Started by jessireebob‎, 10-11-2015 10:22 AM
    • Replies: 0
    • Views: 502
    10-11-2015, 10:22 AM Go to last post
  50. BEST STATISTIC TO USE for TWO STATIC GROUPS?

    I am formulating a study which involves first separating participants into two groups for a specific sleep disorder experienced either no/low fear ...

    Started by yudkush‎, 10-05-2015 09:14 PM
    • Replies: 0
    • Views: 619
    10-05-2015, 09:14 PM Go to last post
  51. psych stats

    vampires in rumanian are 315 years old, on average, with a standard deviation of 5, and the distribution of their ages is mound-shaped and...

    Started by dorion83‎, 10-02-2015 06:59 PM
    • Replies: 3
    • Views: 695
    10-02-2015, 08:10 PM Go to last post
  52. Thumbs up value for the balance of 2 categories (while controlling for absolute number)

    Hi! Thank you so much for any help! Situation: I have different ascriptions per subject which are categorized in female (f), male (m) and...

    Started by Nelly2‎, 10-02-2015 10:07 AM
    • Replies: 0
    • Views: 370
    10-02-2015, 10:07 AM Go to last post
  53. Subscale CFA

    Hi, An existing questionnaire I am using (23 items, supposedly 2 subscales, N = 700) has shown poor fit to the 2-factor model as specified by its...

    Started by nielsl‎, 10-01-2015 09:35 AM
    cfa
    • Replies: 2
    • Views: 717
    10-02-2015, 05:34 AM Go to last post
  54. four way anova

    Hi, I conduct a research with 4 between-subjects independent variables (2 levels each) and 1 dependant variable. I intrested to find out if there...

    Started by natan1‎, 09-30-2015 10:20 AM
    • Replies: 1
    • Views: 604
    09-30-2015, 12:38 PM Go to last post
  55. Question Implications for analysis of survey data when recall time frames differ bt questions

    Hi, I am advising some folks on setting up a brief survey containing questions that measure some well-known health indicators. My curiosity was...

    Started by SabbyATL‎, 09-25-2015 12:48 PM
    recall, survey, time frames
    • Replies: 6
    • Views: 917
    09-30-2015, 11:05 AM Go to last post
  56. Logistic Regression Question

    I have a continuous predictor variable (a score in a class) from 0 to 100 and a binary outcome variable for the passing of a different class...

    Started by Psych_Lab_Rat‎, 09-28-2015 12:55 PM
    • Replies: 1
    • Views: 611
    09-28-2015, 01:54 PM Go to last post
  57. Inter-rater reliability for multiple choice questions, 5 raters per question

    Hi, I'm interested in how people describe messages posted online, so I'm asking people to read messages and choose their topics. My goal is then...

    Started by replica‎, 09-27-2015 09:28 AM
    • Replies: 0
    • Views: 260
    09-27-2015, 09:28 AM Go to last post
  58. Check if Groups differ from Expectation Value

    Hi! I have data from RCT with one treatment group and one control group. Each participant filled out a questionnaire once a weak (stanine scores),...

    Started by LeslieL‎, 09-26-2015 03:16 PM
    • Replies: 0
    • Views: 473
    09-26-2015, 03:16 PM Go to last post
  59. R squared in structural equation modeling

    Hello I recently started working with structural equation modeling. I am doing a study for which I tested a model like this: Var1 --> var2-->...

    Started by Stef Van Puyenbroeck‎, 08-05-2015 07:24 AM
    r squared, sem, structural equation model
    • Replies: 8
    • Views: 1,460
    09-23-2015, 08:49 AM Go to last post
  60. Growth Modeling of Longitudinal Data: Growth factors as predictors in Regression

    Hey! i have this following situation. I have a dataset of four measurement occasions. In the first three occasions the same test was introduced....

    Started by schadeati‎, 09-22-2015 05:52 AM
    • Replies: 0
    • Views: 456
    09-22-2015, 05:52 AM Go to last post

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